<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>

        const arr = [1, 2, [3, 4]];

        // // 序列化
        // console.log( JSON.stringify(arr) );

        // const str = '[1,2,[3,4]]';
        // console.log( JSON.parse(str) ); // [1, 2, [3, 4]]

        // 增
        // localStorage.setItem('arr', JSON.stringify(arr));
        // localStorage.setItem('name', 'zhangsan');

        // 删
        // localStorage.removeItem('name'); // ie8+

        // 查
        // console.log( JSON.parse(localStorage.getItem('arr')) );

        // 改
        sessionStorage.setItem('name', 'lisi');



    </script>
</body>
</html>
